fixed: broke form loading (buttons unhiding, showing feedback message) if PID is not provided,
fixed: broke form loading (buttons unhiding, showing feedback message) if PID is not provided,

https://github.com/kobotoolbox/enketo-express/issues/784

OpenClinica/enketo-express-oc,OpenClinica/enketo-express-oc,OpenClinica/enketo-express-oc